remove linedef action via acs script?

[zzzornbringer]

i have two switches (buttons). when the player uses it, a script runs. i want both switches to disappear into the ground so that you can only use one of them. i can however still use them, even if they're lowered into the ground and not visible anymore.

 

so i thought the solution would be to remove the linedef action from the switches (can be both because they're not repeatable anyways), so that after you activated one, you cannot activate the other. how's that possible though? what's the acs function to do that?

[Aquila Chrysaetos]

Give both lines the same tag and in your ACS, write
 

  SetLineSpecial (113, 0);

Where 113 is the line tag and 0 is the special.